Library›Addition Fluency›One card

A LITTLE SOMETHING WORTH KNOWING

A small discovery. Yours to pass on.

Math & LogicOne small ahaSum

22 + 30

Think it. Then flip it. ahamoraTap to reveal Back to the cue
Math & LogicOne small aha
Your new aha52

22 + 30 = 52. Changing the order gives 30 + 22, the same sum. Source: Addition ↗

ahamoraReference ↗

Keep the thread going

One answer is a beginning.

Share a little curiosity, or follow it into the full collection.

Flip the full deck →

More from Addition Fluency

A few more worth knowing.

  1. 46723 + 27RECALL
    50

    Mental addition

    Open this card ↗
  2. 46823 + 28RECALL
    51

    Mental addition

    Open this card ↗
  3. 46923 + 29RECALL
    52

    Mental addition

    Open this card ↗